引黄济青工程渠首水质变化研究

2011年4月至2012年3月从引黄济青工程渠首取样并分析水质变化情况。结果表明，渠首黄河水含沙量和浊度年平均值分别为0．83kg/m3、754NTU；总氮（TN）含量变化范围为3．43~6．84mg／L，平均值为4．70mg／L；硝酸盐氮（N03-N）是TN的主要形式，占TN的58．5％-90．2％；氨氮（NH3-N）、亚硝酸盐氮（N02-N）、总磷（TP）含量较低；叶绿素a（Chla）变化范围为1．10-7．60mg／m2，平均值为3．96mg／m3。除泄洪、流量低等特殊情形外，不同季节间含沙量、浊度及其他水质指标没有明显差异。

Variation of water quality in headwork of the water diversion project from Yellow River to Qingdao

In order to investigate the feasibility of multiple seasons＂ water diversion in the water diversion project from Yellow River to Qingdao, water samples were collected monthly from headwork over a period of one year （April 2011 to March 2012） for water quality analysis. The results showed that the average total sediment load and turbidity were 0.83 kg]m3 and 754 NTU, respectively. Total nitrogen （TN） concentration was in the range of 3.43-6.84 mg/L and averaged 4.7 mg/L. Nitrate was the main form of TN and accounted for 58.5%-90.2%. Ammonia, nitrite and total phosphorus （TP） concentrations were relatively lower. Chlorophyll a concentration was in the range of 1.1-7.6 mg/m3 and average concentration was 3.96 mg/m3. The results indicated that in addition to flood water release, low flow and other special circumstances, total sediment load, turbidity and other water quality indexes did not vary significantly in different seasons.